The SubStrobe DS-160 is compatible with all Ikelite TTL systems and current digital cameras, as well as all older TTL film cameras including the Nikonos system. A variety of sync cords, sensors, and TTL adapters are available to connect to almost any camera system currently on the market. The SubStrobe DS-160 recycles virtually instantaneously when fired at a fractional power -- whether in TTL or manual mode -- and still in a quick 1.5 sec from full discharge. Use a compatible TTL system and enjoy perfect automatic exposure and an increased number of flashes per full charge. When used in manual settings, the DS-160 offers 10 powers in half-stop increments for precise control over your exposure. A super-bright built-in 5-watt LED modeling light is perfect for focusing or night diving-- all with minimal drain on the strobe"s battery. The beam is even, concentrated, and automatically turns off and on when the strobe fires. The #4060 DS-160 includes interchangeable rechargeable NiMH battery pack, flash diffuser, and standard mount with through-bolt. The NiMH battery pack requires #4066.1 Smart Charger, not included. An optional #9571.4 mount with 1" (2.5cm) diameter ball allows you to build a custom arm or attach the strobe to TLC or Ultralight arm systems. Complete strobe packages are available with strobe, arm, charger, and either sync cord or EV manual controller provide everything you need to add an external flash to your system.